I just saw the following sequence of photos of a jackal biting a lion in its "beard":

http://www.orc.com.na/news-bbc-wildlife-winner.php

A larger version of the pictures is here, with captions in Spanish:
http://www.bbc.co.uk/mundo/video_fot...hacal_rg.shtml

What a plucky jackal. It looks so tiny compared to the lion.